Effect of Different Fertilizing Methods on Soil Anion Variation in Hefei Suburbs
The study is based on the characteristics of high amount of fertilizer application and severity of poten-tial contamination in vineyards and vegetable region in Hefei suburb. The effect of different fertilizing methods on the anion variation in soil was investigated,and the varied feature and possible reason of pH value,electrical conductivity and anion variety in tested soil were analyzed. The result indicated that fertilization can bring a lot of anions into the region soil according to the data of uninterrupted three years investigation,in which the accumula-tion of the common anions such as Cl-,NO3-,SO2-4 and PO3-4 was obvious,the totally increased amount coming to 1-14 times. The soil electrical conductivity tended to increase in the two experimental regions,which at-tained to 370μS/cm for the highest area. Comparatively,increasing amplitude in conventional fertilization region was higher than that in the equilibrium fertilizations. As for pH value,it tended to decrease,however,decrea-sing amplitude for the conventional fertilization region(down by 0. 21 units for the vineyard,and 0. 28 units for the vegetable region)was greater than that for equilibrium fertilizations(down by 0. 15 units for both regions). The investigation result showed that it was prone to accumulation for salinity in vineyards and vegetable region soils,if long-term fertilization follows conventional model.
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万方数据
维普
